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<pre>
<a id='L1' name='L1'></a>dnl mc_UNDELFS_CHECKS
<a id='L2' name='L2'></a>dnl    Check for ext2fs undel support.
<a id='L3' name='L3'></a>dnl    Set shell variable ext2fs_undel to "yes" if we have it,
<a id='L4' name='L4'></a>dnl    "no" otherwise.  May define ENABLE_VFS_UNDELFS for cpp.
<a id='L5' name='L5'></a>dnl    Will set EXT2FS_UNDEL_LIBS to required libraries.
<a id='L6' name='L6'></a> 
<a id='L7' name='L7'></a>AC_DEFUN([mc_UNDELFS_CHECKS], [
<a id='L8' name='L8'></a>  ext2fs_undel=no
<a id='L9' name='L9'></a>  EXT2FS_UNDEL_LIBS=
<a id='L10' name='L10'></a>  AC_CHECK_HEADERS([ext2fs/ext2_fs.h linux/ext2_fs.h], [ext2_fs_h=yes; break])
<a id='L11' name='L11'></a>  if test x"$ext2_fs_h" = xyes; then
<a id='L12' name='L12'></a>    AC_CHECK_HEADERS([ext2fs/ext2fs.h], [ext2fs_ext2fs_h=yes], ,
<a id='L13' name='L13'></a>                     [
<a id='L14' name='L14'></a>#include &lt;stdio.h&gt;
<a id='L15' name='L15'></a>#ifdef HAVE_EXT2FS_EXT2_FS_H
<a id='L16' name='L16'></a>#include &lt;ext2fs/ext2_fs.h&gt;
<a id='L17' name='L17'></a>#else
<a id='L18' name='L18'></a>#undef umode_t
<a id='L19' name='L19'></a>#include &lt;linux/ext2_fs.h&gt;
<a id='L20' name='L20'></a>#endif
<a id='L21' name='L21'></a>                     ])
<a id='L22' name='L22'></a>    if test x"$ext2fs_ext2fs_h" = xyes; then
<a id='L23' name='L23'></a>      ext2fs_undel=yes
<a id='L24' name='L24'></a>      EXT2FS_UNDEL_LIBS="-lext2fs -lcom_err"
<a id='L25' name='L25'></a>      AC_CHECK_TYPE([ext2_ino_t], ,
<a id='L26' name='L26'></a>                    [AC_DEFINE_UNQUOTED([ext2_ino_t], [ino_t],
<a id='L27' name='L27'></a>                               [Define to ino_t if undefined.])],
<a id='L28' name='L28'></a>                    [
<a id='L29' name='L29'></a>#include &lt;errno.h&gt;
<a id='L30' name='L30'></a>#include &lt;stdio.h&gt;
<a id='L31' name='L31'></a>#include &lt;fcntl.h&gt;
<a id='L32' name='L32'></a>#include &lt;stdlib.h&gt;
<a id='L33' name='L33'></a>#ifdef HAVE_EXT2FS_EXT2_FS_H
<a id='L34' name='L34'></a>#include &lt;ext2fs/ext2_fs.h&gt;
<a id='L35' name='L35'></a>#else
<a id='L36' name='L36'></a>#undef umode_t
<a id='L37' name='L37'></a>#include &lt;linux/ext2_fs.h&gt;
<a id='L38' name='L38'></a>#endif
<a id='L39' name='L39'></a>#include &lt;ext2fs/ext2fs.h&gt;
<a id='L40' name='L40'></a>                    ])
<a id='L41' name='L41'></a>    fi
<a id='L42' name='L42'></a>  fi
<a id='L43' name='L43'></a>])
<a id='L44' name='L44'></a> 
<a id='L45' name='L45'></a>dnl
<a id='L46' name='L46'></a>dnl Ext2fs undelete support
<a id='L47' name='L47'></a>dnl
<a id='L48' name='L48'></a>AC_DEFUN([mc_VFS_UNDELFS],
<a id='L49' name='L49'></a>[
<a id='L50' name='L50'></a>    AC_ARG_ENABLE([vfs-undelfs],
<a id='L51' name='L51'></a>        AS_HELP_STRING([--enable-vfs-undelfs], [Support for ext2 undelete filesystem @&lt;:@no@:&gt;@]),
<a id='L52' name='L52'></a>        [
<a id='L53' name='L53'></a>            if test "x$enableval" = "xno"; then
<a id='L54' name='L54'></a>                enable_vfs_undelfs=no
<a id='L55' name='L55'></a>            else
<a id='L56' name='L56'></a>                enable_vfs_undelfs=yes
<a id='L57' name='L57'></a>            fi
<a id='L58' name='L58'></a>        ],
<a id='L59' name='L59'></a>        [enable_vfs_undelfs="no"])
<a id='L60' name='L60'></a> 
<a id='L61' name='L61'></a>    if test x"$enable_vfs" = x"yes" -a x"$enable_vfs_undelfs" != x"no"; then
<a id='L62' name='L62'></a>        mc_UNDELFS_CHECKS
<a id='L63' name='L63'></a> 
<a id='L64' name='L64'></a>        if test x"$ext2fs_undel" = x"yes"; then
<a id='L65' name='L65'></a>            enable_vfs_undelfs="yes"
<a id='L66' name='L66'></a>            mc_VFS_ADDNAME([undelfs])
<a id='L67' name='L67'></a>            AC_DEFINE(ENABLE_VFS_UNDELFS, [1], [Support for ext2 undelfs])
<a id='L68' name='L68'></a>            AC_MSG_NOTICE([using ext2fs file recovery code])
<a id='L69' name='L69'></a>            MCLIBS="$MCLIBS $EXT2FS_UNDEL_LIBS"
<a id='L70' name='L70'></a>        else
<a id='L71' name='L71'></a>            AC_MSG_ERROR([Ext2 libraries not found])
<a id='L72' name='L72'></a>        fi
<a id='L73' name='L73'></a>    fi
<a id='L74' name='L74'></a>    AM_CONDITIONAL(ENABLE_VFS_UNDELFS, [test "$enable_vfs" = "yes" -a x"$enable_vfs_undelfs" = x"yes"])
<a id='L75' name='L75'></a>])
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